The Lin family favors sons over daughters. Lin Guizhi, the eldest daughter, has worked for free in the family pastry shop since childhood. Though her skills are exceptional, she has never received any recognition. On her 23rd birthday, the entire family is busy preparing an engagement banquet for her younger brother, and not a single person remembers her birthday. Late that night, while searching the attic, she discovers an old recipe book and finds that the ancestral rule actually reads, "Passed down to daughters-in-law, not daughters"—yet the plaque hanging on the wall says, "Passed down to sons, not daughters." It turns out her father secretly replaced the ancestral plaque and hid the genuine recipes to monopolize the family business. Guizhi leaves home for the provincial capital and builds a business from scratch using a single surviving recipe page. When her pastry shop becomes famous throughout the city, her father, who has favored sons his entire life, finally bows his head.